Container



Aug. 31 1926.

R. N. DOBLE CONTAINER Filed Dec. 10. 1921 2 Sheets-Sheet 1 Dz vent/11' flawyllballle j frbgleu Aug. 31 1926. 1,597,673

R. N. DOBLE CONTAINER Filed Dec. 10, 1921 2 SheetsSheet 2 m/ I o .l r

' I M21019: 6y

Patented Aug. 31, 1926.

UNITED STATES PATENT OFFICE;

RALPH N. DOBLE, OF BAYSIDE, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO STATE STREET TRUST COMPANY, TRUSTEE, OF BOSTON, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTS.

CONTAINER.

Application filed December 10, 1921.

This invention relates to packaging oontainers, and particularly to sealed containers which are capableof simple and cheap construction, but are durable and capable of extended use.

In the packaging of cake and other food or perishable products, it is desirable to provide a sealed package in which to place the product on the market, but this package should permit of easy access to the contents Without losing its efficiency as a container and being no longer of further use.

To this end. therefore I provide a package which may be cheaply, quicklyand efiiciently formed, filled and closed. In this package I use a form of seal which may be destroyed without affecting the package as a whole or destroying its usefulness as a container. I also provide a means of detecting the line of seal of the package when it is provided with a Wrapper.

The construction and method of folding my container is described and illustrated in the accompanying specification and drawings, throughout which like reference characters are employed to indicate corresponding parts. In the drawings:

Fig. 1 is a view of the carton blank, with the lines of fold indicated.

Figs. 2 and 3 are diagrammatic views showing the different steps in the folding process.

Fig. 4C is a perspective view of the sealed and the,

pack with the wrapper torn awa seal broken by the insertion 0 blade, and

Fig. 5 is a section on the line 5-5, Fig. 4.

The carton blank, formed of cardboard or other inexpensive stock, is adapted to be folded longitudinally to provide a top panel 1, side panels 2 and 3, a bottom panel 4, a sealing flap 5, preferably integral with the top panel 1, and a second sealing flap 6, preferably integral with the side panel 3. The sealing flaps 5 and 6 are adapted to be turned inwardly into the box and fastened together to form a seal joint, movable independently of the container walls and which seal may be destroyed without mutilating the container itself.

The blank is also folded transversely to form the end flaps 7, 8, 9 and 10, adapted a knife Serial No. 521,507;

to be overlapped when the box is folded into shape, the flaps, 7 being preferably cut on an arc, so that the top panel 1 may be opened and closed freely after the seal is broken and the package opened.

It is of course desirable that the carton be formed with the least possible loss of time, and this is accomplished by the folding and sealing machine in which my package may be formed.

Referring to Fig. 2, the sealing flaps 5 and 6 are first turned; second, the front 2 and the side panel 3; third, the flaps 5 and 6 are brought together and gummedor otherwise permanently fastened so that in themselves, independent of any-panel of the box, they form a complete seal. This partially folded blank is then placed in a bottoming machine which overlaps and unites the end flaps 7, 8, 9 and 10, as shown in Fig. 3. First, the curved flap 7 is folded; second, the flap 10; third, the flap 9, and

lastly, the flap 8 to which has been applied some adhesive substance is folded into positlon. The content is then deposited in the partially completed carton, which is placed end for end in the topclosing machine, and

the end flaps 11, 12, 13 and 14 are overlapped in the same fashion as the flaps 7, 8, 9 and 10. The foregoing series of operations produces a completely closed, filled package 15, ready to be wrapped.

This package is then covered by any suitable wrapper W but I provide a wrapper with means for indicating the line of seal of the carton which it covers, as the dotted line'16 shown in Fig. 4:.

To open this package, a knife blade or other sharp instrument B is inserted through the indicating line 16 on the wrapper W between the sealed portions 5 and 6, thereby breaking the seal so that the panel 1 may be lifted up, withdrawing the flaps 7 and 11 from the end portions without multilating or destro ing the package as a of the box meet to form a complete, c osed box.

- closed container, and said top end flaps adapted to swing r out of the container past said end-closure panels, said bottom and side panels having overlapping closure flaps adapted to be united to each other to form a rigid endpanelhaving eely into and flaps when the top panel is opened and closed, and having an inturned longitudinally extending sealing flap at its free edge,

sai sealin end one of said side panels having a similarl disposed sealing flap adapted to abut flap of the top panel when the container is closed and to be adhesively -united thereto whereby to provide a rupturable seal internally of the package permitting delivery of package contents through the top of the container when the top panel is swung open.

2. A rigid non-collapsible top-opening carton, comprising a blank having foldable top, bottom and side panels.- said bottom and side panels having overlapping closure flaps adapted'to be sealed to each other to form a rigid end-closed container, and said top panel having arcuately curved end flaps adapted to swing freely into and out of the container past said end-closure flaps when the top panel is opened and closed, and having an inturned longitudinally extending sealing fiap' at its free edge, and one of said side panels having a similarly disposed sealin 'flap adapted to abut said sealing flap of the top panel when the container is closed and to be adhesively united thereto whereby to provide a rupturable seal internally of the package permitting delive'ryof package contents through the top of the container when the top panel is swung open.

In testimony whereof I aflix my signature j RALPH N. DOBLE. 

